18241821859 has 2 divisors, whose sum is σ = 18241821860. Its totient is φ = 18241821858.

The previous prime is 18241821833. The next prime is 18241821959. The reversal of 18241821859 is 95812814281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18241821859 - 2⁵ = 18241821827 is a prime.

It is not a weakly prime, because it can be changed into another prime (18241821959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9120910929 + 9120910930.

It is an arithmetic number, because the mean of its divisors is an integer number (9120910930).

Almost surely, 2^18241821859 is an apocalyptic number.

18241821859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18241821859 is an equidigital number, since it uses as much as digits as its factorization.

18241821859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 49.

The spelling of 18241821859 in words is "eighteen billion, two hundred forty-one million, eight hundred twenty-one thousand, eight hundred fifty-nine".